(Sr0.75Bi0.25)2(Cu0.75Fe0.25)2YO6.01 tI24 139

• Bi-Cu-Fe-O-Sr-Y
• Fe-Ni-O-Sr
• Bi-Cu-La-O-Sr
• Bi-Cu-La-O-Sr-Y
• structural properties
• magnetic properties
• Moessbauer spectra
• magnetic transitions
• values of Moessbauer spectra
• cuprate
• alkaline
• high-tc superconductor
• chalcogen
• transitional
• tetragonal